How to scan pages from the automatic document feeder (ADF) of TWAIN scanner?

In This Topic

DocumentFeeder class allows to control the document feeder of the device.

Here is an example that demonstrates how to use document feeder of the device:

/// <summary>
/// Acquire images from the document feeder.
/// </summary>
public void AcquireImagesFromAdf(Vintasoft.Twain.Device device)
{
    // disable UI
    device.ShowUI = false;

    // open the device
    device.Open();
    // specify that color images must be acquired
    device.PixelType = Vintasoft.Twain.PixelType.RGB;
    // set the inches as unit of measure
    device.UnitOfMeasure = Vintasoft.Twain.UnitOfMeasure.Inches;
    // set the desired resolution of acquired images
    device.Resolution = new Vintasoft.Twain.Resolution(200f, 200f);

    // if device has feeder
    if (device.HasFeeder)
    {
        // enable feeder
        device.DocumentFeeder.Enabled = true;
        // specify that application want to acquire all pages from the feeder
        device.XferCount = -1;

        // if pages can be scanned in duplex mode
        if (device.DocumentFeeder.DuplexMode != Vintasoft.Twain.DuplexMode.None)
            // enable duplex scanning
            device.DocumentFeeder.DuplexEnabled = true;

        // if feeder can detect paper
        if (device.DocumentFeeder.PaperDetectable)
        {
            // if feeder is loaded
            if (device.DocumentFeeder.Loaded)
                // acquire images asynchronously
                device.Acquire();
        }
        // if feeder cannot detect paper
        else
            // acquire images asynchronously
            device.Acquire();
    }
}

VB.NET

''' <summary>
''' Acquire images from the document feeder.
''' </summary>
Public Sub AcquireImagesFromAdf(ByVal device As Vintasoft.Twain.Device)
    ' disable UI
    device.ShowUI = False

    ' open the device
    device.Open()
    ' specify that color images must be acquired
    device.PixelType = Vintasoft.Twain.PixelType.RGB
    ' set the inches as unit of measure
    device.UnitOfMeasure = Vintasoft.Twain.UnitOfMeasure.Inches
    ' set the desired resolution of acquired images
    device.Resolution = New Vintasoft.Twain.Resolution(200.0F, 200.0F)

    ' if device has feeder
    If device.HasFeeder Then
        ' enable feeder
        device.DocumentFeeder.Enabled = True
        ' specify that application want to acquire all pages from the feeder
        device.XferCount = -1

        ' if pages can be scanned in duplex mode
        If device.DocumentFeeder.DuplexMode <> Vintasoft.Twain.DuplexMode.None Then
            ' enable duplex scanning
            device.DocumentFeeder.DuplexEnabled = True
        End If

        ' if feeder can detect paper
        If device.DocumentFeeder.PaperDetectable Then
            ' if feeder is loaded
            If device.DocumentFeeder.Loaded Then
                ' acquire images asynchronously
                device.Acquire()
            End If
        Else
            ' if feeder cannot detect paper
            ' acquire images asynchronously
            device.Acquire()
        End If
    End If
End Sub

Send Feedback